on the issue of taxes, mitt romney has proposed a 20% across the both tax cut that he says will not increase the deficit and will not shift the burden to middle income taxpayers. yesterday in a radio interview he began to outline how he might pay for that, said he would limit tax deductions for families to $17,000. that is a step toward specificity, but barack obama can go after him on that. by the same token, romney can go after obama because obama's talked about reducing the corporate rate to 28%, but he hasn't specified how he'd pay for it. and then you have the issue of jobs. romney talks about the job record on net from the beginning of president obama's term. and if you do that, it's just about even. maybe a few jobs in the positive territory. but barack obama talks about what's happened since early 2010 since the turnaround started. they'll clash on that. on medicare, the big entitlement spending issue that threatens the bunch the long term. mitt romney's proposed with paul ryan an ambitious reformation of the program that would go to voucher, but he hasn't said what the level of the